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<td nowrap="true" class="pageTitle">概念：表示图形用户界面</td><td width="100%">
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<td valign="top">该指南概述了设计 GUI 的方法。</td>
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<a href="./../../../core.base_rup/roles/rup_user_interface_designer_5C1ECFC9.html" guid="{0F994CCE-2B28-414A-9D31-DA23C13B95D4}">用户界面设计员</a>
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<a href="./../../../core.base_rup/tasks/design_user_interface_DAABE09F.html" guid="{7414C358-6188-4E5C-8C35-F9D4DF3E0123}">设计用户界面</a>
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<div class="sectionHeading">主要描述</div>
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<td class="sectionTableSingleCell"><a id="XE_user-interface__representing_in_design_model" name="XE_user-interface__representing_in_design_model" class="index" key="用户界面（user-interface）" text="在设计模型中表示"></a><a id="XE_class__representing_graphical_interfaces" name="XE_class__representing_graphical_interfaces"></a> 
<p>
    在有大量用户交互的系统中，在<a class="elementLinkWithUserText" href="./../../../core.base_rup/tasks/use_case_analysis_A6990185.html" guid="{28014615-A62F-452D-B821-30C7CAB0EC44}">用例分析</a>期间将整个用户界面表示为单个分析类通常是恰当的。这些类实际上是由许多不同类型的其他类组成的：按钮、窗口、菜单、子窗格和控件等。使用单个类来表示这复杂的协作有时过于简化了。虽然可以使用单个类并随着工作的继续而优化它，但是通常更容易使用一个更广泛的概念
    <b>子系统</b>来表示。
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<p>
    在此情况中，由于我们有限的设计词汇，使用单个类（或子系统）来表示复杂的协作（例如 GUI
    接口）。在某种意义上将该类看成是复杂协作的<b>入口点</b>，但在真正意义上它实际上并不是一个类（它没有良好定义的一组职责，除非是非常松散意义上的）并且它经常在设计流程中消失。最后，发现<b>真实</b>的类和协作，并将每个<b>占位类</b>的行为分发给它们。当产生<a class="elementLinkWithUserText" href="./../../../core.base_rup/workproducts/rup_user_interface_prototype_7237E5AA.html" guid="{3DF10D00-8C80-4429-92B8-C6A221F0F90C}">工作产品：用户界面原型</a>时，由<a class="elementLinkWithUserText" href="./../../../core.base_rup/roles/rup_user_interface_designer_5C1ECFC9.html" guid="{0F994CCE-2B28-414A-9D31-DA23C13B95D4}">角色：用户界面设计员</a>在<a class="elementLinkWithUserText" href="./../../../core.base_rup/tasks/prototype_user_interface_C495CB55.html" guid="{76F14467-3F63-4B22-B672-6EA69D0E6C46}">建立用户界面原型</a>中执行的某些工作也许可以结转和重复使用（依赖于该原型的性质）。
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